Severe thunderstorms produced large hail the size of golf balls and damaging winds over 60 mph across parts of western and north central Nebraska Sunday afternoon and Sunday night. A stationary frontal boundary was responsible for the storms, which first developed in the eastern Nebraska panhandle during the afternoon. One intense, long-lived storm known as a supercell moved southeast along the front and produced several hail reports along its path, as well as a peak wind gust of 67 mph at the North Platte airport at 7:00 p.m. CDT. The initial round of storms moved out of the area by sunset, but a disturbance in the upper levels of the atmosphere resulted in additional storms along the front late. One of the most intense storms was a supercell that produced baseball size hail 6 miles north of Ellsworth at 1045 p.m. MDT, and golf ball size hail 10 miles southeast of Ashby in rural Grant County at 11:31 p.m. MDT.